Etmopterus villosus

GILBERT, 1905


Hawaiian lanternshark
Classification: Elasmobranchii Squaliformes Etmopteridae

Reference of the original description
GILBERT, C.H. (1905)
The aquatic resources of the Hawaiian Islands. Part II. The deep-sea fishes. Bulletin of the United States Fish Commission, 23 (2): 575–713, pl. 66–101

Image of the original description

Etmopterus villosus GILBERT, 1905

Types
Etmopterus villosus
Holotype: USNM: 51583;


Description :


Citation: Etmopterus villosus GILBERT, 1905: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 07/2019

Please send your images of "Etmopterus villosus" to info@shark-references.com

Etmopterus villosus GILBERT, 1905, © FAO, www.fish-base.org
Common names
spa Tollo lucero de Hawaii, fra \(T\) Sagre diablotin, eng Hawaiian lantern shark, eng Hawaiian lanternshark

Short Description
Original Diagnosis after GILBERT, 1905 [1172]: Length of head to first gill-cleft 22.5 hundredths of total length; interorbital width 8; preoral length of snout 11; preocular length of snout 8; least distance between nostrils 4; longitudinal diameter of orbit 7; distance between spiracles 7.5; width of mouth 11; distance from tip of snout to first dorsal spine .38; length of first dorsal spine 5; base of first dorsal 6; space between dorsals 16; length of second dorsal spine 8; base of second dorsal li; length of upper caudal lobe 24; length of pectoral 10.
Lateral margins of snout nearly parallel, the terminal portion very abruptly and bluntly rounded; width of snout equal to that of interorbital space; anterior nasal flap narrow and pointed, the posterior widened horizontally and concave on its anterior face; longitudinal diameter of eye slightly exceeding half interorbital width ; spiracle a short transverse slit, its length one-fifth the interval between spiracles; mouth wide, little arched, the extreme width equaling preoral length of snout: fold at angle of mouth well developed and continued for a short distance along both jaws, its length from angle of mouth equaling to i preoral length of snout; upper teeth in 27 transverse rows, most of the teeth functioning at the same time; each tooth with a central point and a pair of shorter lateral cusps; but one functional series of 29 teeth in mandible, forming an almost complete cutting edge, the single point of each tooth directed nearly horizontally away from the middle line. Insertion of anterior dorsal spine midway between tip of snout and base of upper caudal lobe, and slightly nearer to second spine than to the line joining the spiracles; length of the first spine nearly equal to base of fin; interspace between dorsals equals distance from tip of snout to spiracles. Skin thickly beset with small plates, which bear each a slender spine; along the back, and especially on the tail, these prickles are arranged in lengthwise series; fins largely smooth, with patches of prickles on their basal portions only; small areas immediately behind dorsal, pectoral, and ventral fins naked; lips and buccal groove, nostrils, spiracles, and eye naked, head otherwise uniformly covered. Color warm brown; lower side of head, breast, and abdomen purplish black; dorsals black on basal and anterior, portions, broadly white otherwise; caudal lobes black, the intermediate portion light-margined; pectorals and ventrals dusky with white posterior edges.

Distribution
Eastern Central Pacific: all over the vast Marcus–Necker Ridge, from the Hawaiian region to the seamount ridges south of Japan (as E. princeps) [27300]. Source: www.gbif.org

Human uses
fisheries: of no interest

Biology
Distinct pairing with embrace [17086].

Size / Weight / Age
TL (max): females –652 mm; males –624 mm [27300]

Habitat
benthopelagic; marine; depth range 280 - 1610 m [17640]

Dentition
Description: Upper teeth in 27 transverse rows, most of the teeth functioning at the same time; each tooth with a central point and a pair of shorter lateral cusps; but one functional series of 29 teeth in mandible, forming an almost complete cutting edge, the single point of each tooth directed nearly horizontally away from the middle line [945];
Teeth of upper jaw with 3–7 vertices. Parasymphyseal teeth in adult females with five vertices; in males, with five to seven vertices. Central vertex largest, erect. Second pair of lateral vertices in females smaller than in males (Figs. 1b, 1c). Crowns approximately three times the length of roots. Teeth of lower jaw with one vertex, pronouncedly inclined towards mouth corners, forming a single cutting row; Dental formula: upper jaw, 28–32 (30.9); lower jaw, 37–54 (43.9) [27300]

Remarks
shark-references Species-ID=2195;